Conceptual Physics / MasteringPhysics (Book & Access Card)

12th Edition

ISBN: 9780321908605

Author: Paul G. Hewitt

Publisher: PEARSON

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

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Textbook Question

Chapter 8, Problem 47RCQ

In one of the photos at the beginning of this chapter, Mary Beth uses a torque feeler that consists of a meterstick held at the 0-cm end with a weight dangling from various positions along the stick. When the stick is held horizontally, torque is produced when a 1-kg object hangs from the 50-cm mark. How much more torque is exerted when the object is hung from the 75-cm mark? The 100-cm mark?

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Chapter 8, Problem 46RCQ

Chapter 8, Problem 48RCQ

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Chapter 8 Solutions

Conceptual Physics / MasteringPhysics (Book & Access Card)

Ch. 8 - What are the units of measurement for tangential...Ch. 8 - On a rotating turntable, does tangential speed or...Ch. 8 - A tapered cup rolled on a flat surface makes a...Ch. 8 - How does the tapered rim of a wheel on a railroad...Ch. 8 - 5. What is rotational inertia, and how is it...Ch. 8 - 6. Inertia depends on mass; rotational inertia...Ch. 8 - 7. As distance increases between most of the mass...Ch. 8 - 8. Consider three axes of rotation for a pencil:...Ch. 8 - 9. Which is easier to get swinging: a baseball bat...Ch. 8 - Why does bending your legs when running enable you...

Ch. 8 - 11. Which will have the greater acceleration...Ch. 8 - 12. What does a torque tend to do to an object? Ch. 8 - 13. What is meant by the “lever arm” of a...Ch. 8 - 14. How do clockwise and counterclockwise torques...Ch. 8 - 15. If you toss a stick into the air, it appears...Ch. 8 - Prob. 16RCQ Ch. 8 - 17. If you hang at rest by your hands from a...Ch. 8 - Where is the center of mass of a hollow soccer...Ch. 8 - 19. What is the relationship between the center of...Ch. 8 - 20. Why doesn’t the Leaning Tower of Pisa topple...Ch. 8 - 21. In terms of center of gravity, support base,...Ch. 8 - 22.When you whirl a can at the end of a string in...Ch. 8 - 23. Is it an inward force or an outward force that...Ch. 8 - 24. If the string that holds a whirling can in its...Ch. 8 - 25. If you are not wearing a seat belt in a car...Ch. 8 - 26. Why is centrifugal force in a rotating frame...Ch. 8 - 27. How can gravity be simulated in an orbiting...Ch. 8 - 28. Distinguish between linear momentum and...Ch. 8 - 29. What is the law of inertia for rotating...Ch. 8 - If a skater who is spinning pulls her arms in so...Ch. 8 - Contact Grandpa and tell him how you’re learning...Ch. 8 - Prob. 32RCQ Ch. 8 - Prob. 33RCQ Ch. 8 - Prob. 34RCQ Ch. 8 - Prob. 35RCQ Ch. 8 - Prob. 36RCQ Ch. 8 - Prob. 37RCQ Ch. 8 - Torque = lever arm ×...Ch. 8 - 39. Calculate the torque produced by the same 50-N...Ch. 8 - Prob. 40RCQ Ch. 8 - 41. Calculate the force of friction that keeps an...Ch. 8 - Angular momentum =...Ch. 8 - 43. If a persons speed doubles and all else...Ch. 8 - 44. The diameter of the base of a tapered...Ch. 8 - To tighten a bolt, you push with a force of 80 N...Ch. 8 - 46. The rock and meterstick balance at the 25-cm...Ch. 8 - In one of the photos at the beginning of this...Ch. 8 - 48. An ice puck of mass m revolves on an icy...Ch. 8 - 49. If a trapeze artist rotates once each second...Ch. 8 - A small space telescope at the end of a tether...Ch. 8 - 51. The three cups are rolled on a level surface....Ch. 8 - 52. Three types of rollers are placed on slightly...Ch. 8 - 53. Beginning from a rest position, a solid disk...Ch. 8 - 54. You hold a meterstick at one end with the same...Ch. 8 - 55. Three physics majors in good physical shape...Ch. 8 - Prob. 56RCQ Ch. 8 - Prob. 57RCQ Ch. 8 - Prob. 58RCQ Ch. 8 - 59. The wheels of railroad trains are tapered, a...Ch. 8 - Prob. 60RCQ Ch. 8 - 61. The front wheels of a racing vehicle are...Ch. 8 - 62. Which will have the greater acceleration...Ch. 8 - Prob. 63RCQ Ch. 8 - 64. Is the net torque changed when a partner on a...Ch. 8 - Prob. 65RCQ Ch. 8 - 66. When you pedal a bicycle, maximum torque is...Ch. 8 - Prob. 67RCQ Ch. 8 - Prob. 68RCQ Ch. 8 - Prob. 69RCQ Ch. 8 - Prob. 70RCQ Ch. 8 - 71. Explain why a long pole is more beneficial to...Ch. 8 - Prob. 72RCQ Ch. 8 - Prob. 73RCQ Ch. 8 - Prob. 74RCQ Ch. 8 - Prob. 75RCQ Ch. 8 - Prob. 76RCQ Ch. 8 - Prob. 77RCQ Ch. 8 - Prob. 78RCQ Ch. 8 - 79. The centers of gravity of the three trucks...Ch. 8 - Prob. 80RCQ Ch. 8 - Prob. 81RCQ Ch. 8 - Prob. 82RCQ Ch. 8 - 83. When you are in the front passenger seat of a...Ch. 8 - Prob. 84RCQ Ch. 8 - Prob. 85RCQ Ch. 8 - Prob. 86RCQ Ch. 8 - 87. The occupant inside a rotating space habitat...Ch. 8 - Prob. 88RCQ Ch. 8 - A motorcyclist is able to ride on the vertical...Ch. 8 - 90. The sketch shows a conical pendulum. The bob...Ch. 8 - Prob. 91RCQ Ch. 8 - Prob. 92RCQ Ch. 8 - Prob. 93RCQ Ch. 8 - 94. If all of Earth’s inhabitants moved to the...Ch. 8 - Prob. 95RCQ Ch. 8 - If the world’s populations moved to the North Pole...Ch. 8 - Prob. 97RCQ Ch. 8 - 98. Why does a typical small helicopter with a...Ch. 8 - 99. We believe that our galaxy was formed from a...Ch. 8 - Prob. 100RCQ Ch. 8 - Prob. 101RCQ Ch. 8 - Prob. 102RCQ Ch. 8 - Prob. 103RCQ Ch. 8 - 104.When a car drives off a cliff it rotates...Ch. 8 - 105. Discuss why a car noses up when accelerating...Ch. 8 - 106. Discuss how a ramp would help you to...Ch. 8 - 107. Which will roll down an incline faster: a can...Ch. 8 - 108. Why are lightweight tires preferred in...Ch. 8 - 109. A youngster who has entered a soapbox derby...Ch. 8 - 110. The spool is pulled in three ways, as shown....Ch. 8 - 111. Nobody at the playground wants to play with...Ch. 8 - 112. How can the three bricks be stacked so that...Ch. 8 - 113. A long track balanced like a seesaw supports...Ch. 8 - With respect to Diana’s finger, where is the...Ch. 8 - When a long-range cannonball is fired toward the...Ch. 8 - Most often we say that force causes acceleration....

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